Date Difference Calculator
Count the days, weeks, and months between two dates.
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About the Date Difference Calculator
Count the days between two dates free — pick any start and end date and instantly see the difference in days, weeks, and months. Perfect for deadline math, project timelines, visa and rental periods, pregnancy milestones, and “how many days until vacation” countdowns. Dates can go in either order; the tool uses the absolute difference and handles leap years correctly.
How to use the Date Difference Calculator
- 01Pick a start date and an end date.
- 02Read the difference in days, weeks, and months.
Frequently asked questions
Does it include both the start and end day?
It counts the number of days from the start date to the end date (the span between them).
Can the dates be in any order?
Yes — the tool uses the absolute difference, so order doesn't matter.
How many working days between two dates?
Roughly 5/7 of the total days minus holidays — for exact business-day counts, subtract weekends and your local public holidays from the day total shown.